磁场强化全程自养脱氮工艺的启动

陈云帆; 钱萌萌; 康紫薇; 丁佳慧; 陈静; 贾文林

doi:10.13205/j.hjgc.202008024

磁场强化全程自养脱氮工艺的启动

doi: 10.13205/j.hjgc.202008024

江苏师范大学化学与材料科学学院, 江苏徐州 221116

基金项目:

国家自然科学基金项目（51708263）；江苏省大学生创新创业训练计划项目（201810320170X）；江苏省研究生科研与实践创新计划项目。

详细信息

作者简介:
陈云帆(1996-),女,硕士研究生,主要研究方向为厌氧氨氧化及CANON工艺的优化及应用。2020180412@jsnu.edu.cn

通讯作者:
贾文林(1986-),男,博士,副教授,主要研究方向为新型污水生物脱氮技术。jiawenlin@jsnu.edu.cn

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出版历程
- 收稿日期: 2019-05-05

START-UP OF A COMPLETELY AUTOTROPHIC NITROGEN REMOVAL OVER NITRITE PROCESS ENHANCED BY MAGNETIC FIELD

School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China

摘要

摘要: 为强化全程自养脱氮（CANON）工艺的脱氮性能，利用膜生物反应器（MBR）启动CANON工艺，并对其施加静态磁场进行强化，分析磁场作用下CANON工艺脱氮效果，并对其影响机理进行解析。结果表明：适宜强度的磁场强化了CANON工艺的脱氮效率，并缩短了工艺启动周期。磁场作用下，CANON工艺后期平均氮去除负荷为49.5 g/（m³·d），相比于对照提高了1.45倍。在低温条件下，磁场的存在能使CANON工艺保持较高的反应活性，其平均氮去除负荷为对照组的2.88倍。磁场促进了污泥胞外聚合物的合成与分泌，提高了蛋白的含量，同时降低了反应器内体系Zeta电位，有利于污泥的聚集，使其内部形成不同的氧分区，促进了CANON工艺中不同微生物的共存，从而强化了CANON工艺的脱氮效率。
- 磁场 /
- CANON工艺 /
- 氮去除负荷 /
- 胞外聚合物
Abstract: In order to enhance the nitrogen removal performance of completely autotrophic nitrogen removal over nitrite (CANON) process, membrane bioreactors (MBRs) were constructed to start the CANON process in this study. Static magnetic field (MF) was applied to enhance the CANON process, and the nitrogen removal performance and the mechanism were analyzed. The results showed that MF with suitable intensity enhanced the nitrogen removal rate (NRR) and shortened the start-up period during the CANON process. The average NRR during the late period reached 49.5 g/(m³·d) with the exposure to MF, which was 1.45 times higher than the control. At low temperature, the CANON process could keep high activity with the exposure to MF, and the average NRR was 2.88 times of the control. The MF could stimulate the synthesis and secretion of extracellular polymer (EPS) of sludge, and enhance the contents of protein in EPS. Meanwhile the zeta potential of the mixture in the reactor decreased due to the application of MF, which was conducive to the aggregation of the activated sludge. The oxygen concentration gradient in the flocs favored the coexistence of different microorganisms during CANON process, resulting in the enhancement of nitrogen removal.
- magnetic field /
- CANON process /
- nitrogen removal rate /
- EPS

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参考文献(19)

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